I met Chris McLaughlin at the Mid-Michigan Atheists and Humanists Meet-up last night. He talked to us about a movement he and other people from Detroit are hoping to get going called Grass Roots Atheism (In the link Chris is on the left of your screen). He'd like to see atheists take to the streets, not as the street preachers do who preach to people, but to simply hand people some literature if they're receptive and to let them know we atheists are good people. It's a worthy goal. Consider learning more and consider doing it in your area.

[Edit 3/3/10. It looks like the link is gone. Perhaps they aren't taking to the streets anymore I don't know. The simply found a prominent place with a poster that said "We are Atheists," and passed out some literature].